Weatherstack

Overview

Weatherstack (an APILayer product) provides real-time weather, historical data, and airport weather for any location, with a simple key-based API. The free tier is small but fine for demos and low-traffic widgets.

Quick Start

Current weather (replace YOUR_KEY):

curl "https://api.weatherstack.com/current?access_key=YOUR_KEY&query=London"

With units and language:

curl "https://api.weatherstack.com/current?access_key=YOUR_KEY&query=Paris&units=m&language=zh"

Authentication

• Register at weatherstack.com for a free key (sent by email).
• Send it as the access_key query parameter.
• query accepts city name, lat,lon, or ZIP/postal code.

Rate Limits & Notes

• Free tier: 100 requests/month — plan carefully; the paid tier starts at 1,000/month.
• Free tier updates weather every hour (paid tiers update more often).
• Responses include current conditions, location data, and (on paid tiers) historical & astronomical data.
• HTTPS is enforced on all tiers.
• Data sources vary by region (APILayer aggregates multiple providers).

FAQ

Is Weatherstack free? There’s a free tier (100 requests/month); higher limits are paid.

How do I get a key? Sign up at weatherstack.com — the access key is emailed.

Can I get historical weather? Yes, on paid tiers.